Typical Performance Characteristics

Supply Voltage (V11)

Meter Output vs Supply Voltage

Reference Voltage AGC and

vs IF Input Signal

Mute Control Output (Pin 12)

TLH7149 – 5

Typical Audio Attenuation

(Pin 6) vs Mute Input

Voltage (Pin 5)

TLH7149 – 6

DC Test Circuit

TLH7149 – 7

AC Test Circuit

KAC-K2318HM

TLH7149 – 8

For single tuned dectector coil

For double tuned detector coil

kQ j 07 for V9 j 150 mVrms

Note

The recovered audio output voltage will be approximately 05 dB less when

using the double tuned detector coil

For proper operation of the mute circuit the RF voltage at pin 9 should be

5